Method and system for operating at least two display devices carried by respective vehicle occupants on the head

ABSTRACT

Data characterizing a relative arrangement of vehicle occupants with respect to one another are continuously transmitted to display devices worn on the heads of the vehicle occupants. Virtual environments are displayed as a function of these data.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a U.S. national stage of International ApplicationNo. PCT/EP2019/063014, filed on May 21, 2019. The InternationalApplication claims the priority benefit of German Application No. 102018 213 556.8 filed on Aug. 10, 2018. Both the InternationalApplication and the German Application are incorporated by referenceherein in their entirety.

BACKGROUND

Described below are a method and a system for operating at least twodisplay devices worn on the head by respective vehicle occupants.

In the future, route-dependent virtual reality experiences, using whichvehicle occupants can experience different virtual events during travelwhile wearing augmented reality glasses or also virtual reality glasses,will highly probably become established in vehicles at latest from theincreased use of autonomously driving vehicles.

The use of augmented reality glasses and also virtual reality glasses assuch is already known from the related art. Thus, for example DE 10 2015014 450 A1 discloses virtual reality glasses and a method for operatingvirtual reality glasses. The virtual reality glasses include a firstdisplay device for displaying a virtual environment for a wearer of thevirtual reality glasses, wherein a second display device is attached toan outside of the virtual reality glasses in order to display the samevirtual environment for a person standing on the outside as the wearerof the virtual reality glasses has displayed.

DE 10 2014 015 871 A1 discloses a display system for a motor vehicle anda method for operating such a display system. The display system mayinclude augmented reality glasses which are worn by a driver of themotor vehicle, and virtual reality glasses which are worn by a frontpassenger of the motor vehicle.

DE 10 2012 017 700 A1 discloses a system and a method for simulating anoperation of a nonmedical tool. Data glasses are used here to display avirtual environment for a wearer of the data glasses, wherein a displaydevice is used to display an image of the wearer within the virtualenvironment.

SUMMARY

Described below is a method by which at least two display devices wornon the head by respective vehicle occupants can be operated particularlywell adapted to one another. According to this method for operating atleast two display devices worn on the head by respective vehicleoccupants, respective virtual environments are displayed by the displaydevices. During this, data characterizing a relative arrangement of thevehicle occupants with respect to one another are continuouslytransmitted to the display devices and the virtual environments aredisplayed as a function of these data.

The display devices worn on the head can be, for example, augmentedreality glasses, augmented reality contact lenses, or also virtualreality glasses. The method enables synchronization of the content ofin-car virtual reality experiences. Since many journeys with motorvehicles will very probably also take place in community in the future,in particular in the case of autonomously driving vehicles, a supply ofmechanisms for providing shared experiences is very useful. Against thisbackground, the method enables a shared synchronous experience ofvirtual environments in the motor vehicle.

It is thus possible, for example, that the at least two vehicleoccupants who wear the display device on the head jointly experiencesomething cooperative or also competitive in the form of the respectivedisplayed virtual environment. For this purpose, a permanent informationexchange takes place between the employed display devices worn on thehead, in that data characterizing a relative arrangement of the vehicleoccupants with respect to one another are continuously transmitted tothe respective display devices and the virtual environments aredisplayed as a function of these data.

The display devices themselves can include, for example, sensors orother detecting devices, by which an alignment and positioning of therespective display devices can be ascertained. These data can betransmitted to the respective other display device in order tocontinuously ascertain the respective relative arrangement of thevehicle occupants in relation to one another and to display the virtualenvironment as a function thereof. It is also possible, for example thatsensors installed in the respective vehicles are used to ascertain arelative positioning of the vehicle occupants with respect to oneanother, so that data in this regard can be continuously transmitted tothe relevant display devices. It is thus possible that at least twovehicle occupants wear one of the display devices on the head, by whichrespective virtual environments are displayed, wherein the displayedvirtual environments are synchronized with one another with respect tocontent, above all with regard to the relative arrangement of thevehicle occupants with respect to one another. It is fundamentallyunimportant here whether the vehicle occupants are seated in the samevehicle or in different vehicles.

One advantageous embodiment provides that respective head movements ofthe vehicle occupants are continuously detected by respective detectiondevices and are transmitted as part of the data to the display devices,wherein the detected head movements determine a respective virtualperspective of the vehicle occupants on the respective virtualenvironments. Thus, if the vehicle occupants each rotate their heads,the respective virtual perspective of the relevant vehicle occupants onthe respective displayed virtual environments therefore changes. Thevehicle occupants can thus influence the perspective from which theywish to view the respective virtual environments in a simple manner.

A further advantageous embodiment provides that if the vehicle occupantsare located in different vehicles, a relative movement of the vehicleswith respect to one another is detected and transmitted as part of thedata to the display devices, wherein the detected relative movementdetermines a respective virtual perspective of the vehicle occupants onthe respective virtual environments. The vehicle occupants seated orarranged in different vehicles can thus, for example, experience avirtual car race game or a virtual space battle or the like jointly as avirtual experience. Depending on how the different vehicles move withrespect to one another, the respective virtual perspective of thevehicle occupants on the respective virtual environments changes. Thevehicle occupants seated in the different vehicles can thus, forexample, play a particularly realistically appearing car race game, andcan—if this also takes place with the vehicles in reality—also mutuallyovertake one another, for example with their virtual vehicles or virtualspace planes or the like, and may also appear within the virtualenvironment. Alternatively, it is also possible that the vehicleoccupants are located in the same vehicle, wherein in this case only therelative movements of the vehicle occupants with respect to one anotherwithin the same vehicle are detected and taken into consideration in thedisplay of the respective virtual environment.

One alternative advantageous embodiment provides that if the vehicleoccupants are located in different vehicles, respective relativemovements of the vehicle occupants with respect to respective vehicleinteriors are detected and transmitted as part of the data to thedisplay devices, wherein the detected relative movements determine arespective virtual perspective of the vehicle occupants on therespective virtual environments and a relative movement of the vehicleswith respect to one another remains unconsidered. It could thus be, forexample that the two vehicle occupants who are seated in differentvehicles share a virtual experience with one another in which therelative movement of the different vehicles with respect to one anotherwould not be relevant at all and the implementation of which would evenbe disturbing. In this case, it is particularly advantageous if simplyonly respective relative movements of the vehicle occupants with respectto respective vehicle interiors of the different vehicles are detected,in which the respective vehicle occupants are presently seated, so thatthese detected relative movements exclusively determine respectivevirtual perspectives of the vehicle occupants on the respective virtualenvironments. For example, if one of the vehicle occupants in therelevant vehicle leans to the right, he thus also leans to the rightwithin the virtual environment. It is unimportant here how the vehiclein which this vehicle occupant is seated is presently moving in relationto the other vehicle in which the other vehicle occupant is seated.

In a further advantageous embodiment, it is provided that respectiveavatars of the respective other vehicle occupants are displayed as partof the virtual environments by the display devices in accordance withthe relative arrangement of the vehicle occupants with respect to oneanother within the virtual environments. The vehicle occupants can thussee respective virtual representations of the respective other vehicleoccupant in the form of the avatars within the respective virtualenvironment. If both vehicle occupants are seated in the same vehiclenext to one another, for example, a respective avatar of the relevantvehicle occupant is thus located in the respective displayed virtualenvironment on the left or right, respectively, of a virtual position ofthe respective other vehicle occupant within the respective displayedvirtual environment. The vehicle occupants can thus very easilyexperience something cooperative or competitive with one another withinthe virtual environment, for example.

A further advantageous embodiment provides that respective headmovements of the vehicle occupants are detected and converted intocorresponding head movements of the avatars. The vehicle occupants canthus, by way of corresponding head movements, cause the respectiveavatars in the virtual environments to pivot their head to the left andright, for example precisely like the vehicle occupants in reality. Itis thus possible, for example, that the vehicle occupants can mutuallylook at one another and also turn away from one another within thevirtual environment by way of their respective avatars.

In a further advantageous embodiment, it is provided that inputs of afurther person on a user interface are detected and the virtualenvironments are adapted in accordance with the detected inputs. It isthus possible, for example, for persons standing on the outside withoutvirtual reality glasses or also augmented reality glasses to influencethe virtual experience for the other vehicle occupants. The outsider canthus, for example, change the virtual experience for the vehicleoccupants and, for example, adapt an upcoming route section recognizableto them, as a result of which a virtual route section is also adaptedaccordingly. Very generally, an outsider can thus externally influencerespective virtual experiences of the vehicle occupants who wear thedisplay device on the head. The outsider is thus also incorporated in acertain form into the virtual experience and a type of socially sharedexperience results. For example, a vehicle-side user interface, inparticular a touch screen or the like, is used here as the userinterface. Alternatively, it is also possible that a mobile terminal, inparticular a smart phone, a tablet computer, or a smart watch, is usedas the user interface. Thus, for example smart devices of vehicleoccupants can be used or also an interaction element in one of thevehicles, for example an infotainment touchscreen.

The system for operating at least two display devices worn on the headby respective vehicle occupants is configured to carry out the methodaccording to the invention or an advantageous embodiment of the method.

Further advantages, features, and details result from the followingdescription of exemplary embodiments and on the basis of the drawing.The features and feature combinations mentioned above in the descriptionand the features and feature combinations mentioned hereinafter in thedescription of the figures and/or shown solely in the figures are usablenot only in the respective specified combination, but also in othercombinations or alone, without leaving the scope of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

These and other aspects and advantages will become more apparent andmore readily appreciated from the following description of the exemplaryembodiments, taken in conjunction with the accompanying drawings ofwhich:

FIG. 1 is a schematic illustration of a motor vehicle in which twovehicle occupants each wearing virtual reality glasses are seated,wherein moreover a system is provided which enables a synchronization ofthe content of the virtual environment displayed by the virtual realityglasses; and

FIG. 2 is a schematic illustration of two motor vehicles, wherein avehicle occupant wearing virtual reality glasses is seated in each casein the respective motor vehicle and the system is provided, for example,in one of the motor vehicles.

DETAILED DESCRIPTION

Reference will now be made in detail to the exemplary embodiments whichare illustrated in the accompanying drawings, wherein like referencenumerals refer to like elements throughout.

In the figures, identical or functionally identical elements have beenprovided with the same reference signs.

A motor vehicle 1 is shown in a very schematic illustration in FIG. 1.Two vehicle occupants 2, 3, who have put on respective virtual realityglasses 4, 5, are seated in the motor vehicle 1. Reference is alwaysmade in conjunction with this figure and also the other figure tovirtual reality glasses, wherein the explanation hereinafter can alsoapply, for example, to augmented reality glasses, augmented realitycontact lenses, and the like. Moreover, a system 6 is provided in themotor vehicle 1, which is used for operating the two virtual realityglasses 4, 5. Contrary to the present illustration, the system 6 canalso be formed solely by the two pairs of virtual reality glasses 4, 5,which in this case may communicate wirelessly with one another and canthus exchange data with one another.

Respective virtual environments are displayed by the virtual realityglasses 4, 5. During this, a relative arrangement of the vehicleoccupants 2, 3 with respect to one another is ascertained continuously,wherein data in this regard are transmitted to the system 6 or alsotransmitted directly to the respective virtual reality glasses 4, 5. Thevirtual environments displayed by the virtual reality glasses 4, 5 aredisplayed as a function of the detected relative arrangement of thevehicle occupants 2, 3.

Thus, for example respective head movements of the vehicle occupants 2,3 can be continuously detected, for example by the virtual realityglasses 4, 5, and transmitted to the respective virtual reality glasses4, 5 or to the system 6. The respective detected head movementsdetermine in this case a respective virtual perspective of the vehicleoccupants 2, 3 on the respective virtual environments which aredisplayed by the virtual reality glasses 4, 5.

As a component of the virtual environment, respective avatars of therespective other virtual occupants 2, 3 can also be displayed by thevirtual reality glasses 4, 5 in accordance with the relative arrangementof the vehicle occupants 2, 3 with respect to one another within thevirtual environment. The two vehicle occupants 2, 3 can thus mutuallysee one another in the respective displayed virtual environments in theform of avatars and can interact with one another, for example. In thiscontext, it can also be provided that respective head movements of thevehicle occupants 2, 3 are detected and converted into correspondinghead movements of the avatars. It is thus possible, for example, thatthe two vehicle occupants 2, 3 can look at one another or also turn awayfrom one another in the form of the respective avatars in the respectivedisplayed virtual environments.

Moreover, it is possible that inputs from a further vehicle occupant 7,who has not put on virtual reality glasses, are also detected, whereinthe virtual environments which are displayed by the virtual realityglasses 4, 5 are adapted in accordance with the detected inputs of thefurther person 7. The vehicle occupant 7 can input his inputs relatingto the virtual environments at a user interface 8. The user interface 8can be, for example, a touchscreen in the motor vehicle 1.Alternatively, it is also possible that the user interface 8 is a smartdevice, for example in the form of a smart watch, a smart phone, atablet computer, or the like. The further vehicle occupant 7, withouthimself wearing virtual reality glasses, can thus socially interact withthe further vehicle occupants 2, 3, who have put on the virtual realityglasses 4, 5, namely in that he performs certain inputs which influencethe respective virtual experience of the vehicle occupants 2, 3. Thefurther person 7 can also be arranged outside the motor vehicle 1, inorder to make these inputs, for example via his smart phone.

Two motor vehicles 1, 9 are shown in FIG. 2, wherein one vehicleoccupant 2, 3, who has put on virtual reality glasses 4, 5, is seated ineach of the motor vehicles 1, 9. In contrast to the exemplary embodimentshown in FIG. 1, it is provided here that the vehicle occupants 2, 3 arethus seated in different motor vehicles 1, 9 but also jointly share avirtual experience, in that respective virtual environments are againdisplayed by the virtual reality glasses 4, 5, wherein datacharacterizing a relative arrangement of the vehicle occupants 2, 3 withrespect to one another are continuously transmitted during this betweenthe virtual reality glasses 4, 5 and the virtual environments aredisplayed as a function of these data. If, as shown here, the vehicleoccupants 2, 3 are located in different motor vehicles 1, 9, a relativemovement of the motor vehicles 1, 9 with respect to one another can bedetected and transmitted as part of the data to the respective virtualreality glasses 4, 5. The detected relative movement of the motorvehicles 1, 9 with respect to one another determines a respectivevirtual perspective of the vehicle occupants 2, 3 on the respectivevirtual environments in this case.

It is thus possible, for example, that the vehicle occupants 2, 3 seatedin the different motor vehicles 1, 9 jointly play a virtual car race orthe like. If the motor vehicles 1, 9 pass one another in reality, forexample they are controlled fully autonomously, it can thus be providedthat the vehicle occupants 2, 3 see respective avatars of the respectiveother vehicle occupant 2, 3 in the displayed virtual environment who arearranged in corresponding virtual motor vehicles. It is also conceivablethat the vehicle occupants 2, 3 start a car race jointly proceeding froma virtual starting point independently of the precise positioning of themotor vehicles 1, 9, wherein the relative movement of the motor vehicles1, 9 with respect to one another is then also taken into consideration.

Alternatively, it is also possible that only respective relativemovements of the vehicle occupants 2, 3 with respect to the respectivevehicle interiors of the motor vehicles 1, 9 are detected and exchangedbetween the virtual reality glasses 4, 5. The detected relativemovements determine a respective perspective of the vehicle occupants 2,3 on the respective virtual environments which are displayed by thevirtual reality glasses 4, 5. A relative movement of the motor vehicles1, 9 with respect to one another remains unconsidered. The vehicleoccupants 2, 3 seated in the different motor vehicles 1, 9 can thusalso, for example, share a common virtual experience, during which therelative movement of the motor vehicles 1, 9 with respect to one anotherremains unconsidered. It is solely decisive here how the vehicleoccupants 2, 3 move in relation to the respective vehicle interiors ofthe motor vehicles 1, 9. For example, if the vehicle occupant 2 bends tothe right and the vehicle occupant 3 bends to the left, this can thushave the result in the virtual environment that the two vehicleoccupants 2, 3 mutually approach one another within the virtualenvironment, independently of the relative movement of the motorvehicles 1, 9.

Contrary to the present description, it is in turn also possible that afurther vehicle occupant 7 can have an influence on the respectivevirtual environments, which are displayed by the virtual reality glasses4, 5, via a user interface 8—as described in conjunction with FIG. 1.

It becomes clear on the basis of the explained exemplary embodiments howa synchronization of the content of various in-car virtual realityexperiences can take place and moreover how an influence of the contentcan take place by inputs of a person 7 who has not put on virtualreality glasses or augmented reality glasses.

A description has been provided with particular reference to exemplaryembodiments thereof and examples, but it will be understood thatvariations and modifications can be effected within the spirit and scopeof the claims which may include the phrase “at least one of A, B and C”as an alternative expression that means one or more of A, B and C may beused, contrary to the holding in Superguide v. DIRECTV, 358 F3d 870, 69USPQ2d 1865 (Fed. Cir. 2004).

The invention claimed is:
 1. A method for operating at least two displaydevices respectively worn on heads of vehicle occupants in at least onetransportation vehicle traveling on public roads between differentlocations, comprising: displaying respective virtual environments by theat least two display devices in the at least one transportation vehicle;and continuously transmitting during the displaying, data characterizinga relative arrangement of the vehicle occupants with respect to oneanother, to the at least two display devices, the virtual environmentsbeing displayed as a function of the data.
 2. The method according toclaim 1, further comprising detecting respective head movements of thevehicle occupants by respective detection devices, wherein the datatransmitted to the at least two display devices indicate the respectivehead movements of the vehicle occupants, and wherein the displayingrelies on the respective head movements to determine respective virtualperspectives of the vehicle occupants in the respective virtualenvironments.
 3. The method according to claim 2, further comprising,when the vehicle occupants are located in different vehicles, detectinga relative movement of the different vehicles on the public roads withrespect to one another, wherein the data transmitted to the at least twodisplay devices indicate the relative movement of the differentvehicles, and wherein the displaying relies on the relative movement ofthe different vehicles to determine the respective virtual perspectivesof the vehicle occupants in the respective virtual environments.
 4. Themethod according to claim 3, further comprising, when the vehicleoccupants are located in different vehicles, detecting respectiverelative movements of the vehicle occupants with respect to respectivevehicle interiors, wherein the data transmitted to the at least twodisplay devices indicate the respective relative movements of thevehicle occupants, and wherein the displaying relies on the respectiverelative movements of the vehicle occupants in combination with therelative movement of the different vehicles to determine the respectivevirtual perspectives of the vehicle occupants in the respective virtualenvironments.
 5. The method according to claim 4, wherein the displayingdisplays avatars of at least one of the vehicle occupants as a componentof the respective virtual environments by the at least two displaydevices in accordance with the relative arrangement of the vehicleoccupants with respect to one another within the respective virtualenvironments.
 6. The method according to claim 5, wherein the displayingconverts the respective head movements of the vehicle occupants intocorresponding head movements of the avatars.
 7. The method according toclaim 6, further comprising detecting inputs of a person at a userinterface, and wherein the displaying adapts the virtual environments inaccordance with the inputs.
 8. The method according to claim 7, whereina vehicle-side user interface with a touchscreen is the user interface.9. The method according to claim 7, wherein one of a smart phone, atablet computer and a smart watch is the user interface.
 10. The methodaccording to claim 1, further comprising, when the vehicle occupants arelocated in different vehicles, detecting a relative movement of thevehicles with respect to one another on the public roads, wherein thedata transmitted to the at least two display devices indicate therelative movement of the vehicles, and wherein the displaying relies onthe relative movement of the vehicles to determine the respectivevirtual perspectives of the vehicle occupants in the respective virtualenvironments.
 11. The method according to claim 10, further comprising,when the vehicle occupants are located in different vehicles, detectingrespective relative movements of the vehicle occupants with respect torespective vehicle interiors, wherein the data transmitted to the atleast two display devices indicate the respective relative movements ofthe vehicle occupants, and wherein the displaying relies on therespective relative movements of the vehicle occupants in combinationwith the relative movement of the different vehicles to determine therespective virtual perspectives of the vehicle occupants in therespective virtual environments.
 12. The method according to claim 1,wherein the displaying displays avatars of at least one of the vehicleoccupants as a component of the respective virtual environments by theat least two display devices in accordance with the relative arrangementof the vehicle occupants with respect to one another within therespective virtual environments.
 13. The method according to claim 12,wherein the displaying converts the respective head movements of thevehicle occupants into corresponding head movements of the avatars. 14.The method according to claim 1, further comprising detecting inputs ofa person at a user interface, and wherein the displaying adapts thevirtual environments in accordance with the inputs.
 15. A system locatedin at least one transportation vehicle traveling on public roads betweendifferent locations, comprising: at least two displays worn onrespective heads of vehicle occupants of the at least one transportationvehicle; at least one communication interface coupled to the at leasttwo displays; and at least one processor, coupled to the communicationinterface, configured to continuously receive data, characterizing arelative arrangement of the vehicle occupants, via the communicationinterface, and cause the at least two display device to display, whilethe data is received, respective virtual environments as a function ofthe data.
 16. The system according to claim 15, wherein the at least twodisplays are configured to detect respective head movements of thevehicle occupants, and transmit, to the at least one processor via thecommunication interface, information representing the respective headmovements of the vehicle occupants, and wherein the at least oneprocessor is further configured to determine respective virtualperspectives of the vehicle occupants in the respective virtualenvironments.
 17. The system according to claim 15, wherein the at leasttwo displays are located in different vehicles, and wherein the at leastone processor is further configured to determine the respective virtualperspectives of the vehicle occupants in the respective virtualenvironments based on respective relative movements of the differentvehicles traveling on the public roads.
 18. The system according toclaim 17, wherein the at least two displays are located in differentvehicles, and wherein the at least one processor is further configuredto determine the respective virtual perspectives of the vehicleoccupants in the respective virtual environments based on respectiverelative movements of vehicle occupants in the different vehicles andrelative movements of the different vehicles traveling on the publicroads.
 19. The system according to claim 15, wherein one of the at leasttwo displays, at least one communication interface and at least oneprocessor are incorporated in each of at least two modified-realityglasses.